Hey guys, I am hoping for some help here. I have an AC/DC Premium and there is the 5 bank drop targets on the left hand side (A-C-/-D-C). the first three are controlled together on one board behind the drop target and the last two are controlled together. On occasion, and getting to be more and more common, as soon as you start a game the first three (which are controlled together) will go up and down like a machine gun and then end up down and stay down. There is no friction on the three drop targets, and no friction on the coil. it does appear, visually that the coil is only pushing the targets up halfway. I have replaced all the High Current Transistors and the Bridge rectifier, that are attached to this drop bank, and it fixed it for a couple days and is back at the ole machine gun again. Has anyone experienced this before? or is it just time to buy a new driver board?